This post is about access to post custom fields or post meta data. User interface is presented at post editor page by “Custom Fields” meta box:
Read more Access to custom fields (post meta) ›

Is it possible to grant to a user access to view and edit the WooCommerce orders only and do not provide access to any other part of WooCommerce? The short answer is “Yes”. Read a whole article to dive into the details. Read more WooCommerce – view and edit orders only ›

1st, I have to mention that, it’s very difficult to restore the lost WordPress admin permissions, if you are not familiar with SQL even as a beginner. It’s better to hire an experienced developer to help you in this case.
If you decide to try to fix the issue yourself, then let’s start. Read more Restore lost WordPress admin permissions ›

Ninja Forms plugin protects all its menu items with ‘manage_options” user capability by default. Read more Ninja Forms plugin menu access ›

If you wish to manage Contact Form 7 plugin menu access you can be misleaded by capabilities which CF7 uses when defines its menu: Read more Contact Form 7 plugin menu access ›